vSphere Mobile Client, developed by VMware Inc., is a powerful tool that allows administrators to monitor and manage their vSphere infrastructure directly from their mobile devices. With this app, administrators can log in to a vCenter Server and easily manage virtual machines, hosts, and clusters.

The app provides a comprehensive set of features, including a virtual machine list that provides an overview of resource consumption and detailed information on each VM. Administrators can also access the VM console, view events and performance charts, and execute quick actions.

The ESXi host list provides an overview of resource consumption and important host details such as host state and uptime. From there, administrators can access the host details page, which includes events and performance charts.

The cluster list gives administrators an overview of cluster resource consumption and configuration information, such as DRS, HA, and the number of migrations.

One of the standout features of vSphere Mobile Client is the task monitoring capability. Administrators can subscribe to any running task and receive push notifications on their mobile device when the task is completed, even if the device is inactive or another application is running in the foreground.

Performance charts allow administrators to monitor resource usage in real-time or view historical data for up to a year. Counters include CPU, Memory, Storage, and Network.

Please note that the app has been tested on vCenter server version 6.0 and above, and secure access methods such as VPN may be required for accessing vSphere infrastructure on a mobile device.

Overall, vSphere Mobile Client is a valuable tool for vSphere administrators who need to manage their infrastructure on the go. While it currently has a limited subset of functionality as a tech preview release, regular updates are expected to bring new features based on user feedback.